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AS27C256-12JI Datasheet(PDF) 7 Page - Austin Semiconductor |
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AS27C256-12JI Datasheet(HTML) 7 Page - Austin Semiconductor |
7 / 13 page UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 AS27C256 Rev. 2.0 7/06 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 7 Austin Semiconductor, Inc. NOTES: 1.Timing measurements are made at 2V for logic high and 0.8V for logic low (see figure 2). 2. Common test conditions apply for t dis except during programming. 3. Value calculated from 0.5V delta to measured output level. This parameter is only sampled and not 100% tested. SWITCHING CHARACTERISTICS FOR PROGRAMMING: V CC = 6.5V and VPP = 12.75V (AMD FLASHRITE ALGO), T A = 25°C CAPACITANCE OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERAT- ING FREE-AIR TEMPERATURE, f = 1MHz* * Capacitance measurements are made on a sample basis only. ** Typical values are at T A = 25°C and nominal voltages. SWITCHING CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLT- AGE AND OPERATING FREE-AIR TEMPERATURE1,2 TEST CONDITIONS TYP** MAX UNIT Ci Input capacitance VI = 0V 610 pF Co Output capacitance VO = 0V 10 14 pF PARAMETER MIN MAX MIN MAX ta(A) Access time from address 120 150 ns ta(E) Access time from E\ 120 150 ns ten(G)R Output enable time from G\ 40 50 ns tdis Disable time of output from G\ or E\, whichever occurs first 3 0 30 0 30 ns tv(A) Output data valid time after change of address, E\, or G\, whichever occurs first 3 00 ns PARAMETER -12 see Figure 2 -15 UNIT TEST CONDITIONS 1, 2 MIN MAX MIN MAX MIN MAX ta(A) Access time from address 170 200 250 ns ta(E) Access time from E\ 170 200 250 ns ten(G)R Output enable time from G\ 50 60 60 ns tdis Disable time of output from G\ or E\, whichever occurs first 3 040 0 50 060 ns tv(A) Output data valid time after change of address, E\, or G\, whichever occurs first 3 000 ns see Figure 2 -25 UNIT TEST CONDITIONS 1, 2 PARAMETER -17 -20 MIN MAX UNIT tdis(G) Output disable time from G\ 0 130 ns ten(G)W Output enable time from G\ 150 ns PARAMETER |
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